Cochlear Nucleus 7 User Manual page 77

Coil
CHARACTERISTIC
Technology
Operating voltage
Data rate
Protocols
Separation between coil
and implant
Sound processor to implant inductive link
The inductive link between the sound processor coil and the
implant performs two functions: it transfers power from the
sound processor to the implant; and provides a bi-directional
data communication link. Both power and data are transferred
in the reactive near H-field. The link uses a Cochlear
proprietary embedded protocol employing a series of 4 or 5
consecutive pulses clocked at 5 MHz and operates over a
distance of 1-10 mm. Data validity and parity checking is used
to ensure correct data transfer. In the presence of interference,
the sound processor triggers a "coil-off" orange light
indication and the Nucleus Smart App provides a visual
indication that the coil is decoupled from the implant.
NUCLEUS 7 SOUND PROCESSOR USER GUIDE
VALUE/RANGE
Inductive power and data transfer using coupled
resonant coils
2.0 V to 2.6 V
1.25 Mbps (4 CPC), 1 Mbps (5 CPC)
Cochlear's proprietary embedded protocol
employing a series of 4 or 5 consecutive pulses
at 5 MHz
1-10 mm
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